<template>
  <div class="count">
    <h1>我的名字是{{ name }}，我的位子是{{ address }}</h1>
    <h1>当前求和为:{{ sum }}</h1>
    <h1>当前求和后的10倍为:{{ largeSum }}</h1>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
      <option value="4">4</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
import { mapState, mapGetters } from "vuex";
export default {
  name: "Count",
  data() {
    return {
      n: 1, //用户选择的数字
    };
  },
  computed: {
    /* 
    sum() {
      return this.$store.state.sum;
    },
    name() {
      return this.$store.state.name;
    },
    address() {
      return this.$store.state.address;
    }, 
    */

    //借助mapState生成计算属性,从state中读取数据 (对象写法)
    // ...mapState({ sum: "sum", name: "name", address: "address" }),

    //借助mapState生成计算属性,从state中读取数据 (数组写法)
    ...mapState(["sum", "name", "address"]),
    //这种写法要求取出来的属性名，和state中存的数据名是一样的

    /****** *******************************************   ***** */
    /* largeSum() {
      return this.$store.getters.largeSum;
    }, */
    // ...mapGetters({ largeSum: "largeSum" }), 对象写法

    ...mapGetters(["largeSum"]), //数组写法
  },

  methods: {
    increment() {
      this.$store.commit("JIA", this.n);
    },
    decrement() {
      this.$store.commit("JIAN", this.n);
    },
    incrementOdd() {
      this.$store.dispatch("jiaOdd", this.n);
    },
    incrementWait() {
      this.$store.dispatch("jiaWait", this.n);
    },
  },
};
</script>
<style>
button {
  margin-left: 5px;
}
</style>